Fail to Call WebServices in ASP.NET in Javascript
Question
I fail to call a webservice. What have I miss? @@
I am trying to follow this instructions here: How to call an ASP.Net Web Service in javascript
And below are my codes, but fails to work.
This is my webservice codes:
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Web.Script.Services;
namespace Library
{
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
[System.Web.Script.Services.ScriptService()]
public class ReleaseSessionObject : System.Web.Services.WebService
{
[WebMethod]
public string HelloWord()
{
return "Hellow Word!";
}
}
}
and this is my ASP.NET page codes:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm6.aspx.cs" Inherits="Library.WebForm6" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<script src="ReleaseSessionObject.asmx" type="text/javascript"></script>
<script type="text/javascript">
function HelloWorld() {
try {
var a = Library.ReleaseSessionObject.HelloWorld();
alert(a);
}
catch (err) {
alert(err.Message);
}
};
</script>
<asp:ScriptManager ID="ScriptManager1" runat="server">
<Services>
<asp:ServiceReference Path="~/ReleaseSessionObject.asmx" />
</Services>
</asp:ScriptManager>
<input type="button" onclick="HelloWorld();" value="Click This" />
</div>
</form>
</body>
</html>
both ASP.NET page and Service files are located at the same folder.
but when I click on the button. It says: undefined
3 answers
solution1
1 2013-06-07 04:24:18
solution2
1 2013-06-07 04:42:35
try making it async:
function HelloWorld() {
Library.ReleaseSessionObject.HelloWorld(OnCompleted);
}
function OnCompleted(data) {
alert(data);
}
solution3
-1 2013-06-07 04:52:29
Your method in the web service asmx file says HelloWord but in the markup it says HelloWorld . It says undefined because it cannot find the method due to the spelling mistake.
If you do not succeed then try the following example: Calling ASMX web services directly from javascript
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.